27777117778136 has 8 divisors (see below), whose sum is σ = 52082095834020. Its totient is φ = 13888558889064.

The previous prime is 27777117778061. The next prime is 27777117778139. The reversal of 27777117778136 is 63187771177772.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 27777117778136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777117778139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1736069861126 + ... + 1736069861141.

Almost surely, 2^{27777117778136} is an apocalyptic number.

It is an amenable number.

27777117778136 is a deficient number, since it is larger than the sum of its proper divisors (24304978055884).

27777117778136 is a wasteful number, since it uses less digits than its factorization.

27777117778136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3472139722273 (or 3472139722269 counting only the distinct ones).

The product of its digits is 237180384, while the sum is 71.

The spelling of 27777117778136 in words is "twenty-seven trillion, seven hundred seventy-seven billion, one hundred seventeen million, seven hundred seventy-eight thousand, one hundred thirty-six".